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gophysics

GitHub GitHub go.mod Go version Go Reference

A set of some of the most common physics formulas and constants.

Features

  • It provides Physics formulas and constants for calculation porpuses.
  • It allows to create some objects to simplify some calculations (see example).
  • It also provides some common Math formulas in Physics.

Which formulas are contained?

Classical mechanics

  • Force, Speed, Time, Work, Acceleration, Density, Intensity, Power, Momentum
  • Potential Energy, Mechanical Energy, Kinetic Energy, Frequency, Doppler Effect
  • Centripetal Acceleration, Centripetal Force, Pendulum Period, Projectile motion equations

Gravity

  • Potential Gravitational Energy, Universal Gravitational Law, Gravitational Field
  • Escape Speed

Fluids

  • Stokes's Law, Hagen-Poiseuille's Law

ElectroMagnetism

  • Ohm's Law, Capacitance, Voltage, Coulomb's Law, Energy Density
  • Electric Field, Eletric Potential Energy Difference.

Termodynamics

  • Gay-Lussac's Law, Net Heat Energy, Heat Flux, Eletric Field Flux, Joule Heating

Relativity

  • Lorentz Factor, Relativistic Time, Relativistic Distance, Relativstic Mass, Relativistic Momentum
  • Photoelettric Effect, Drift Speed.

How to use it

  • Download the 'formulas' package to get the Physics formulas:
go get -u github.com/Gabri432/gophysics/formulas
  • Download the 'constants' package to get the Physics constants:
go get -u github.com/Gabri432/gophysics/constants
  • Download the 'mathem' package to get the Mathematical functions and constants of the library
go get -u github.com/Gabri432/gophysics/mathem
  • Example of usage
package main

import (
    "fmt"
    "github.com/Gabri432/gophysics/constants"
    "github.com/Gabri432/gophysics/formulas"
)

func main() {
    fmt.Println(constants.C)   // Write a constant
    fmt.Println(formulas.Force(3, 4))   // Call a function
    myPlanet := formulas.PlanetBody{Mass: constants.EARTH_MASS, Radius: constants.EARTH_RADIUS} // Create a custom object
	fmt.Println(myPlanet.EscapeSpeed())  // Call object methods to ease some calculations
}

=== Output ===
299792453  
12 N       <<< When calling functions their output is the value and the measurement unit
11183.719071923773 m/s
  • Using mathematical functions
import (
    "fmt"
    "github.com/Gabri432/gophysics/mathem"
)

func main() {
    fmt.Println(mathem.Pi) // Writing a constant
}

=== Output ===
3.1415926535

Project Structure

Folders

gophysics (main)

  • gophysics.go, doesn't provide formulas, but other functions to simplify some actions.
  • license, readme.md, readme.it.md, CHANGELOG.txt.

formulas

  • classical.go, where all the Classical physics formulas are located.
  • fluids.go, where all the Fluid formulas are located.
  • gravity.go, where all the Gravity formulas are located.
  • thermodynamics.go, where all the Thermodynamics formulas are located.
  • electromagnetism.go, where all the Electromagnetism formulas are located.
  • relativity.go, where all the Relativity formulas are located.

constants

  • constants.go, where all the constants are located.

mathem

  • constants.go, where all the mathematical constants are located.
  • conversions.go, where all the main functions to make mathematical calculations are located.

Contributing to this project

Notes

  • Formulas were taken from this italian book: Title - "Fisica Volume 1", Authors - ["Paolo Mazzoldi", "Massimo Nigro", "Cesare Voci"].